It’s always easy for me to remember how many years we’ve been married. You just take whatever the current year is and add one more. (Math is hard.) After 21 years of sharing a last name, we have learned quite a few things about building a life together. One recurring theme has been that communication in marriage is key. But even after all this time, I find it so interesting that the source of all of our disagreements has always been miscommunication. If you think two decades together will ensure that you can practically read each other’s mind, think again. It’s a constant work in progress. But it’s worth the…